Device for relieving choke in elevator-boots



No. 749,071. PATENTED JAN. 5, 1904.

I. LUTZ.

DEVICE FOR RELIEVING CHOKE IN ELEVATOR BOOTS.

APPLICATION FILED AUG. 21, 1903.

N0 MODEL.

wi/bnwoco UNITED STATES Patented January 5, 1904.

PATENT OFFICE.

ISAAC LUTZ, OF FRANKFORT, MICHIGAN.

SPECIFICATION forming part of Letters Patent No. 749,071, dated January5. 1904.

I Application filed August 21, 1903. Serial No. 170,370. (No model.)

To aZl whom it may concern:

Be it known that I, ISAAC LUTZ, a citizen of the United States ofAmerica, residing at Frankfort, in the county of Benzie and State ofMichigan, have invented certain new and useful Improvements in Devicesto Relieve Choke in Elevator-Boots, of which the following is aspecification.

This invention relates to conveyers,and particularly to that subclassthereunder known as endless-conveyer boots.

An object of the invention is to overcome a tendency of the grain tochoke within the boot and to relieve the pressure on the conveyer incase of choking.

Furthermore, an object of the invention is to provide novel means whichwill relieve the pressure within the boot and at the same time guardagainst wasting of grain or other material which is being acted upon.

A still further object of the invention is to produce novel means forretaining the relieving device in place and permitting its release I setforth and claimed.

In describing the invention in detail reference will be had to theaccompanying drawings, forming part of the specification,wherein likecharacters denote corresponding parts in the several views, and in whichFigure 1 is a sectional view of an elevatorboot with the inventionapplied thereto. Fig. 2 is a sectional view taken on the line 2 2 ofFig. 1. Fig. 3 is a sectional view taken on the line 3 3 of Fig. 1; Fig.4: is a perspective view of one of the guards.

In the drawings, 1 indicates a conveyor of ordinary construction whichhas door-openings 2, usually controlled by sliding shutters or doors.

This invention contemplates the substitution of anautomatically-controlled pressurel'eliever mounted to guard thedoor-opening and comprising in its construction two side walls, whichfit on the outer surface of the sides of the boot, anda front 3, thesaid side walls being connected by the front 3, which when the device isin position to close the door-opening fitsagainst the flanges 4 on eachside of the said dooropening. Bolts 5 are anchored in the flanges 4 andhave threaded ends projecting through slots 6, formed in the sides ofthe guard. Thumb-nuts are applied to the bolts for binding the sides ofthe device in contact with the boot in order to prevent displacementunder ordinary pressure. The tension of the thumb-nuts may be soregulated as to cause the guard to yield when the pressure within theboot has reached a pre determined point.

Each guard is provided with a hinge 7 ,which is secured to the lower endof the front plate 3, one leaf of the spring being secured to the edgeof the casing which forms the boot. The hinge is of suificient width tofit within the opening in order to prevent escape of the grainbetweenthe end of the front plate and the casing. The upper end of the frontplate has a flange 8, which fits between the flange 4, which with theremainder of the closing device completely guards the door-opening.

It will be observed that this guard is duplicated on each end of theboot and that both doors may be employed to relieve the pressure. Ifdesired, the thumb nuts of one guard may be set with greater tensionthan that of the other door, so that if the movement of one guard failsto relieve the pressure the other guard will then be operated. Of courseit may be desirable to have the tension of the nuts so great as topreclude the movement of the guards except when they are released by anoperator after the choking has occurred.

By the use of the guards of the character noted it will be observed thatwhen they are opened to relie e the pressure said guards form apocket-like receptacle into which the grain from the pocket may becrowded without the usual loss of grain incident to the relief of thepressure within the boot.

The construction, operation, and advantages will, it is thought, beunderstood from the foregoing, it being noted that various changes maybe made in the details of construction without departing from the scopethereof.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an elevator-boot a body havinga dooropening, a guard comprisingside and end pieces, having slots transversely disposed, means forhinging the guard in the door-opening, bolts in the slots of the sidesand means for clamping the sides against the boot.

2. In an elevator-boot a body having adooropening, side flanges for thedoor-opening, a guard pivoted in the door-opening and having a topflange fitting between the side flanges of the door-opening when theguard is closed, means for hinging the guard in the door-opening andmeans for clamping the guard to the boot.

3. In an elevator-boot a body havinga dooropening, a flange at each sideof the dooropening, a guard comprising sides and an end piece, the saidsides having slots'therein, a flange on the upper end of the end piecefitting between the flanges of the door-opening, and binge secured tothe inner surface of the end piece at its lower end and secured to thelower edge of the boot-frame forming a dooropening, bolts projectingfrom the flanges of the boot into the slots of the guard and nuts forclamping the sides to the boot.

In testimony whereof I aflix my signature, in the presence of twowitnesses, this 4th day of August, 1903.

ISAAC LUTZ. Witnesses:

GEORGE WHITBECK, K. SCHIPPERS.

